Ore-concentrating machine.



PATENTED JULY 2, 1907.

A. H- STBBBINS. ORE C0NGEN'IRA TINGy MACHINE.

sHBsTs-BHBET 1.

APPLICATION FILED MAY 11, 1906. y

No. 859.024. PATENTED JULY 2, 1907. A. H. sTEBBINs.

ORE GONCENTRATING MACHINE. APPLIOATION FILED MAY11,19oe.

2 SHEETS-SHEET 2.

ALBERT H. STEBBINS, OF LITTLE ROCK, ARKANSAS.

ORE-CONCENTRATING MACHINE.

Specification of Letters Patent.

Patented July 2, 1907.

Application led May 11, 1906. Serial No. 316,240.

To all 'whom it may concern:

Be it known that I, ALBERT H. S'rnBBINs, a citizen of theUnited States,residing at Little Rock, in the county of Pulaski and State of Arkansas,have invented certain new and useful Improvements in Ore-ConcentratingMachines, of which the following is a specification.

VThe invention to be hereinafter described relates to ore. concentratingmachines and, more particularly, to that typerwherein finely divided orcomminuted material is subjected to a shaking motion while travelingover a concentrating surface, whereby such material becomes stratified,the heavier particles, which constitute the values, sinking to thebottom, and the lighter particles, which constitute the waste, rising tothe top, so that the thus stratified particles may be readily supported.The object of the present invention is to provide a machine of thegeneral character stated, wherein desired motions may be imparted to theconcentrating surface as the material passes over it, such surface beingYpreferably inclined diagonally upon a suitable table and adapted tohave currents of fluid, such as air, for instance, directeddihereover`and through the material as it gradually moves down the surface.

The invention consists of the parts and combinations to beV hereinafterdescribed and then definitely pointed out in the claims. i

In the drawings, Figure l is a side elevation, part being in section, ofthe machine embodying the present invention. Fig. 2 is a plan view ofthe top of the main frame with the table removed. Fig. 3 is a plan oftheparts shown in Fig. l. Fig. 4 is a section on line y-y of Fig. 3, andFig. 5 is a detail of the lifting bearings which give vertical movementto the concentrating surface as it is moved transversely. i

The main frame A of the machine may be of any suitable or desiredcharacter and have supported thereon in suitable bearings a main shaftA, from which the remaining parts of the machine derive motion. Mountedupon the main shaft A is the pulley A2 which has a y belt connection ato a pulley a, which drives a fan in a suitable casing, A3, see Fig. 1.Also suitably mounted on the main frame is a shaft B carrying a pulley hwhich has a belt connection b with a pulley b2 on the main shaft A.Mounted upon the shaft B are certainL cam devices B which act upon thelower end of the lever with relation to the base may be readily changedas desired. The table D is appropriately vsupported upon. thel top 'ofthe main frame A and preferably by roller bearings. In the presentillustration of the invention, see Fig. 5, the roller bearings consistof the small rollers e held in suitable bracketshe secured to the mainbearings, acting upon the rollers e, will cause the table D to be givena vertical movement. It has been lfound that such vertical movement isparticularly desirable in some characters of ore in order to give thematerial a lifting tendency, especially, at the end of its vibrating oragitatingmovement.` The brackets e', carrying the rollers e, arepreferably adjustable, as shown byl the slots e3, Fig. 2, whereby thisvertical movement may be brought about at any desired point of thetransverse travel of the table, as will presently appear. For instance,vif ,it is desired to give the table a lifting action as it movestransversely in one direction, the brackets e will be adjusted so thatthe travel of the lifting bearing over the roller` e would be to theleft in Fig. 5, but said brackets e can be adjusted towards one or theyother end of the lifting bearings so as to cause a downward movement ofthe table as it approaches one end of its transverse travel. results areobvious and result merely from changing the position of the brackets ewith relation to the lifting bearings e2. l

Mounted upon the main frame A are the crank disks F F each disk beingprovided with a pin f, projecting upward into a hole in the base, d, ofthe table D. Connected to one of the crank disks, as F,is a'strapf,which is attached also to the end of the lever C. This strap is suitablyconnected to the crank disk by a pin f2, and at' its opposite end f3, itis connected uo a spring f4, whose remote end is engaged by a pin f 5,projecting from' the main frame. i

It is obvious, of course, that changes might be made with respect to thedetails of arrangement, but from the general construction described asembodying a form of the present invention, it will be noted that as thecam device B rotates and strikes the end of the lever C, it will causethe crank disk F to loscillate on its bearings, and through the pin fthis motion, which is in the arc of a circle, will be transmitted to thetable D, the two` crank disks F F acting as parallel link motions togive the table D a-short vibrating movement transversely of itself inthe arc of a circle, the table, at such times,

riding upon the ball bearings e.

Mounted upon the inclined support ing platform 1F of the table D is theconcentrating lr-vic, consisting of by a`fan device, such as thatalready described and as' shown in Fig. l.

Below the concentrating surface G is the air or fluid y chamber G intowhich the air or Ifluid blasts are forced.' y

It has been found in practice that the material coming down theconcentrating surface from the hopper g will have a tendency to pile upin some parts along the concentrating surface, and the air or fluid willat once seek to escape through the' lines of the least resistance. Toavoid this Icontingency and compel the air or fluid currents to passwith substantial uniformity through the concentrating surface the lowerwall of the chamber G is provided with the abrupt inclines g so that theair or other Ifluid, striking these abrupt inclines, will be forcedupwardly through the concentrating surface.

Disposed transversely of the concentrating surface and directly abovethe same, are a series of riles h, Figs. l and 3, and asthestratification o f the material takes place, the heavier particles willlodge above these rifiles and, by the transverse agitating movement ofthe concentrating device, will gradually move towards the concentratedischarge openings to one side of the device, as seen in Figs. 3 and 4at h, said openings being preferably controlled by means of slidingdoors h2.V As the concentrates emerge from the openings h/ they nd theirWay ,into the concentrate chutes h3, from which' they are appropriatelycollected, 'as shown in Fig. 4.

Extending obliquely across the riiles h are a series of retaining orscreening bars .lc which serve to guide the upper strata or wastematerial away from the concentrate'openings h and finally enable it tobe discharged over the discharge end H of the concentrating device,Figs. l and 3.

It will be noticed in Fig. 3, for instance, that the concentratingdevice containing the surface G is arranged diagonally of the supportingplatform of the table, -and that the rifiles h extend transversely ofsuch surfaces G, but not at right angles to the sides thereof. Materialplaced in the hopper 'g and traveling down the concentrating surface Gwill thus have its concentrates lodge above the rifiles h, and thecircular, transverse agitation given to the table D .and theconcentrating device will cause the concentrates to gradually move tothe openings h for their discharge, the rising and falling movementgiven by the lifting bearings being of particular use in some kinds ofores to further agitate and keep in motion the ore bearing mass. It willbe noticed that the rising and fall-ing movements of the table D aresecured by virtue of its transverse agtating movement under theinfluence of the parallel motion devices, as best seen in Fig. 2.

Variations may, of course, be made in the details of structure withinthe scope of the present invention and different forms ofconcentratingdevices may be employed in connection with the table andits agitating instrumentalities.

Having thus described my invention what I claim and desire to secure byLetters Patent is:

1. In an ore concentrating machine, the combination of a main frame, atable comprising a base and a supporting platform, means for adjustingthe inclination of the platform to said base, ball bearings between thetable and main frame for supporting said table, parallel motion devicesdisposed between the table and main frame to give to the table shortmotions in the arc of a circle transversely of the table, a lever'connected to one of said parallei motion devices, and a cam forvibrating said level'.

2. 1n an ore concentrating machine, the combination of a main frame, atable comprising a base and a supporting platform adjustable ininclination with respect thereto, a lever and intermediate device forgiving the table a transverse circular' motion to and fro, and liftingbearings for giving the table a short vertical motion as it movestransversely.

3. In'Han orc concentrating machine, the combination of a mainframe, atable comprising a base and supporting platform, rollers and liftingbearings disposed between the table and main frame to support and givethe table a vertical movement, a crank disk mounted on the main frameand having a .pin engagement with the table, a lever connected with saidcrank disk, and cam devices for vibrating said lever to cause the tableto move in a transverse circular path.

4. In an ore concentrator, the combination of a main frame, a tablehaving an inclined supporting platform, a-

concentrating surface mounted yon said platform, means for giving thetable and concentrating surface a transverse circular vibratory motionand devices for giving to said table` and surface a vertical movement asthey are moved transversely.

5. In an ore concentrator, the combination of a main frame, a tablehaving an inclined supporting platform, a concentrating surface mountedonsaid platform, rifiles extending transversely of said surface, meansfor giving the table and concentrating surface a transverse circularvibrator-y moti-on and devices for giving to said table and surface avertical movement as they are moved transversely.

6. In an ore concentrating machine, a main frame, a table comprising abase and supporting platform movably mounted on said frame and mechanismfor imparting t0 said table a combined transverse eircularand rising andfalling motion.

',[n testimony whereof I affix my signature in presence of twowitnesses.

W. F. BLAcKwoon, J. E. LEAs.

